pratfall
n.
1939, from prat "buttock" + fall, n.. "Chiefly N. Amer. slang" [OED]. As a verb from 1940.
| 词汇 | pratfall | 
| 词根词缀 | Online Etymology Dictionary pratfall n. 1939, from prat "buttock" + fall, n.. "Chiefly N. Amer. slang" [OED]. As a verb from 1940. | 
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